• Lagging Power Factor: They cause the electrical current to lag behind the voltage waveform, mimicking the behavior of electromagnetic devices.
• Reactive Load Simulation: They are primarily used to simulate real-world equipment such as electric motors, transformers, solenoids, and HVAC compressors.
• Full Capacity Testing: When used with a resistive unit (Combined Load Bank), they allow for testing a generator at its full 100% nameplate kVA rating. Most industrial generators are rated at 0.8 power factor, which cannot be tested by resistive loads alone. For more details click here

Resistive – Inductive Load Banks are load banks that contain both resistive (kW) and inductive (kVAr) load elements in the same cabinet. Thus, it provides both resistive and inductive loads at the same time for power sources such as Generator, UPS, Gas Turbine, whose operating loads are mixed (kW+kVAr) type, It offers the opportunity to test the devices at 100% kVA.

Note

Combined type Load Banks contain both resistors and inductors that are used to provide load testing at a lagging power factor or to regulate the power factor. In this way, it provides the opportunity to test the generator at 100% kVA. Resistive-Reactive loads can simulate the operation of motor loads and electromagnetic devices within a power system. It can also provide a purely resistive load.

Most gen-sets are designed and manufactured with a power factor of 0.8 power. The power Factor (Pf) of Resistive Load banks is 1.0. Therefore, it cannot fully provide the kVA value that the generator group can give. For example, a 1000 kVA generator set can only supply 800 kW of power to a purely resistive load bank. Therefore, a full load test of the motor can be made with a resistive load bank, but it can be tested up to a maximum of 80% of the rated current of the alternator. This means that the alternator and control system has not been tested to rated limits.

Usage areas

Mixed Type Load Banks have a wide usage area. The main areas of use are listed below.

• OEM: It is used to verify the design nominal values of power supplies such as generators, UPS, alternators, transformers produced in factories.
• Telecom: It is used for controlled discharge and testing of batteries.
• Energy: It is used for capacity measurement test in the field or in the service after maintenance and repair services of products such as Gas Turbine, Wind Turbine, Generator, UPS.
• Data Center: It is used for electrical and thermal simulation and performance tests of data centers to be established with data center load banks.
• Dummy Load: To prevent low load operation (Wet-Stacking), it is used to automatically activate when the field loads that feed the generator fall below ≤ 30%.

General Features

Resistive-Inductive Load Banks can be produced with various cabinet types and ventilation types in accordance with different needs. In order to get the right result, these issues should be considered when choosing a load bank

If the Load Bank is to be used in a closed environment that will not be affected by environmental conditions, it can be preferred with the Indoor Type Cabinet with IP20 Protection class.
If it will work under a porch in an external environment, cabinets between IP20 / IP41 will be suitable.
Apart from these, load banks with IP54 and IP 56 protection classes can be produced that can work safely in the external environment without taking any extra precautions.

 Key Applications

• Generator Performance: Testing a generator's voltage regulation, alternator excitation systems, and its ability to handle transient events like motor starts.
• Switchgear Evaluation: Verifying the performance of load tap changers, conductors, and power transfer equipment under realistic operating conditions.
• Industrial Commissioning: Ensuring that backup power systems in factories, data centers, and large commercial buildings can handle the complex "mixed" loads they will face during an outage.